diff --git a/src/Plugin/DisplayVariant/PanelsDisplayVariant.php b/src/Plugin/DisplayVariant/PanelsDisplayVariant.php
index a7854d7..e1552e0 100644
--- a/src/Plugin/DisplayVariant/PanelsDisplayVariant.php
+++ b/src/Plugin/DisplayVariant/PanelsDisplayVariant.php
@@ -139,7 +139,12 @@ class PanelsDisplayVariant extends BlockDisplayVariant implements PluginWizardIn
    */
   public function getBuilder() {
     if (!isset($this->builder)) {
-      $this->builder = $this->builderManager->createInstance($this->configuration['builder'], []);
+      if (empty($this->configuration['builder'])) {
+        $this->builder = $this->builderManager->createInstance('standard', []);
+      }
+      else {
+        $this->builder = $this->builderManager->createInstance($this->configuration['builder'], []);
+      }
     }
     return $this->builder;
   }